1 Grease an 8x 1 1/2 inch round baking pan. Set aside.
2 Cook chopped onion in 1 tablespoon of the margarine or butter until onion is tender.
3 Stir together the milk and egg. Add to biscuit mix; stir just until moistened. Add the onion mixture, half of the cheese, and half of the poppy seed to biscuit mix mixture. Spread batter in prepared pan. Sprinkle with the remaining cheese and the remaining poppy seed. If desired, arrange cooked onion on top.
4 Melt remaining margarine; drizzle over mixture in pan. Bake in a 400° oven about 20 minutes or until a wooden toothpick inserted near the center comes out clean.